OBD Guide

C0308

Motor A/B Circuit Low

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Unstable idle
  • Increased fuel consumption

Causes

  • Open or shorted wiring harness
  • Faulty solenoid
  • Problems with the engine control unit
  • Bad contacts in connectors

How to Fix

  1. Check wiring harness for damage
  2. Check solenoid resistance
  3. Check the voltage in the circuit
  4. Clean or replace connectors if necessary
  5. Replace faulty solenoid
  6. Reflash or replace the ECU if necessary

Related codes

Error C0308 by Vehicle Brand